Add a controller to support addon template

[zhujian7]

implement for the proposal: https://github.com/open-cluster-management-io/enhancements/pull/87

[zhujian7]

/cc @qiujian16 @haoqing0110 @zhiweiyin318

[zhujian7]

@qiujian16 PTAL

[zhujian7]

/cc @qiujian16 PTAL

[openshift-ci[bot]]

@zhujian7: GitHub didn't allow me to request PR reviews from the following users: PTAL.

Note that only open-cluster-management-io members and repo collaborators can review this PR, and authors cannot review their own PRs.

In response to [this](https://github.com/open-cluster-management-io/addon-framework/pull/187#issuecomment-1597229320): >/cc @qiujian16 PTAL Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes/test-infra](https://github.com/kubernetes/test-infra/issues/new?title=Prow%20issue:) repository.

[zhujian7]

/hold

[zhujian7]

/unhold

[qiujian16]

/approve /lgtm /hold

@zhiweiyin318 @haoqing0110 Please also take a look

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: qiujian16, zhujian7

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/open-cluster-management-io/addon-framework/blob/main/OWNERS)~~ [qiujian16] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[haoqing0110]

/lgtm

[zhiweiyin318]

/unhold